Type-bar for type-writing machines



(No Model.)

S. N. GALLUP. TYPE BAR FOR TYPE WRITING MACHINES.

No. 445,170. Patented Jan. 27,1891.

7 T i 1 I Il||n| IIIHHHII UNITED STATES PATENT OFFICE.

SILAS N. GALLUP, OF MACEDON, NE\V YORK.

TYPE-BAR FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 445,170, dated January 2'7, 1891.

Application filed November 30, 1883. Serial No. 292,186. (No model.)

To aZZ whom it may concern:

Be it known that I, SILAs N. GALLUP, of Macedon, in the county of IVayne and State of New York, have invented certain Improvements in Type-Writers, of which the follow ing is a specification.

This invention relates to those swinging type-carrying arms which are employed in the Remington, caligraph, and similar machines; and itconsists in an improved construction of the pivot-bearings designed to permit speedy and accurate adjustment to compensate for wear without changing the position of the arm or its printing-point. To this end I mount each arm on a stationary pivot-plate or divide the end of the arm, so that it may be contracted upon the pivot, and provide it with a screw or equivalent device for eflfecting the contraction.

The invention is susceptible of embodiment 1n various equivalent forms, three of which are shown in the accompanying drawings.

Figure is a side elevation of my improved arm in its preferred form. Fig. 2 is a trans verse section through the arm and its supporting-pivot on the line so an of Fig. 1. Fig. 3 is a side view of the arm in a slightly different form. Fig. 4 is a side view of the arm in still another form, its stationary pivot being shown in vertical cross-section.

IVith the exception of its pivoted end, the arm may be in all respects of ordinary construction, and as it may be mounted and operated in the ordinary manner it is deemed unnecessary to illustrate other parts in the drawings.

Referring to Figs. 1 and 2, A represents the iypcarm of substantially the ordinary form; B, the stationary horizontal pivot on which it turns, and C the bracket or plate in which the pivot is rigidly secured.

The arm shown in Figs. 1 and 2 is divided at its rear or pivoted end by a slit or incision a, lying in a plane parallel with the axis of the pivot, and is provided with a transverse screw 17, by means of which the divided end may be contracted, so as to more closely embrace the pivot. The pivot is formed with a circumferential groove of V shape, the sides of which form conical or tapered wearingsurfaces 0 c. The pivot-opening through the type-arm is made of corresponding form, in order that it may closely embrace the conical surfaces, as shown. Asa consequence of this construction, the contraction of the bar serves to compensate for wear and to bring the wearing-surfaces snugly together without the slightest tendency to throw the bar laterally out of adjustment or to change the path through which it swings.

Instead of extending the slot longitudinally of the bar, as shown in Fig. 1, it may be extended laterally through the lower edge, as shown in Fig. 3, a screw 1) being applied across the slot to effect the contraction, as in the previous example.

In Fig. 4 I have shown a bar divided longitudinally, as in Fig. 1, that its end may be contracted around the pivot. In place, however, of the contracting-screw I employ a nut (I, applied around the end of the arm, which is threaded to receive it. The arm is suitably tapered, so that the turning of the nut toward the pivotserves to effect the contraction or compression of the arm.

It will be observed that in my structure the pivot-pin is a solid and continuous piece and rigidly sustained at both ends within the cheeks of the sustaining-bracket O. This arrangement prevents play or vibration of the parts and causes the arm to swing with that accuracy which is of prime importance in a type-writer.

IVhat I claim is- 1. In a type-writer, a stationary bearing plate or bracket, a rigid pivot-pin B, fixed at its two ends in said plate and provided at its middle with the encircling V-groove, in combination with the type-carrying arm having the divided end encircling the pin and fitting the groove, and means for contracting said end, substantially as described.

2. In a type-writer, the stationary bearingplate and the continuous grooved bearingpin fixed therein at its two ends, in combination with the type-carrying arm having the exterior screw-thread and the divided end clasping the grooved part of the pin, and the ring or nut applied to the arm, as shown.

In testimony whereof I hereunto set my hand, this 2tth day of November, 1888, in the presence of two attesting witnesses.

SILAS N. %ALLUP. Witnesses:

W. W. MORTIMER, STANLY ELMORE. 

